It'll take a bit of Registry editing.
The 64 bit version of SONAR doesn't really install the SF link properly.
Here's the registry key and what it should look like.
[HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software\Tools Menu\Sound Forge 10]
"exePath"="C:\\Program Files (x86)\\Sony\\Sound Forge Pro 10.0\\forge100.exe"
"MenuText"="&Sound Forge 10"
"StatusBarText"="Run Sound Forge 10"
"Type"="WaveEditor"
check your registry entry and edit to suit or
Edit the above text to fit your circumstances, then save as sf.reg Double click it and it will automatically add it to your tools/Utility menu.